Circuit-closing device



April 5, 1927.

E. T. BELLMAM CIRCUIT CI OSING DEVICE Filed July 6. 1925 flaw 1%? Edward"1.Ea1lma11 Patented 'Apr. 5, 1927.

UNITED STATES 1,623,571 PATENT OFFICE.

EDWARD T. BELLMAN, 0F ROCKFORD, ILLINOIS, ASSIGNOR OF ONE-THIRD T0 JAMESJ. RANEY, OF ROCKFORD, ILLINOIS.

OIRGUIT-CLOSIN G DEVICE.

Application filed July 8,

This invention relates to vehicle burglar alarm systems.

Objects of this invention are to provide a burglar alarm system for avehicle which is' so constructed that an alarm will be given when thehood or any of the doors are opened, whenever the automobile occupies adifferent position with reference to a horizontal line from that inwhich it was left, and when an attempt is made to remove the rear tire.

Further objects are to provide an alarm system for 'an automobile whichmay be readily hidden, which is of simple construction, and which isextremely efi'ective'in operation.

An embodiment of the invention is shown in the accompanying drawings, inwhich Figure 1 is a diagrammatic view showing the system.

Figure 2 is a view of a part of the device responsive to changes inposition of the machine.

Referring to the drawings, it will be seen that the alarm system isprovided with a horn 1 or other suitable device of this general nature.Obviously, lights ma be employed in addition to the horn, i desired, andother sounding means may be substituted for the horn. Preferably, thishorn is hidden.

A battery 2 is employed for energizing the horn or signal device andthis battery preferably comprises a' separate and hidden batterydistinct from the main'battery of the machine, although it is understoodthe main battery could be used. The battery has one end connected withthe signal device and the other end connected through ,a key controlledswitch 3 with oneof the mains 4, such main being hereinafter referred toas the live main. The other side of the signal devices is connected withthe main 5 which is ground, as indicated at 6.

A plurality of switches 7 are illustrated in the drawings, and it isintended that these switches be placed on each of the several doors,andon the hood and luggage carrier flap or compartment flap of themachine. It is not thought necessary to detail these switches as anysuitable type of switch may be employed which-is closed when the, dooror similar member is opened. These switches are of well knownconstruction.

A position, responsive device 15 indicated 1925. Serial Ho. 4 1,751.

receives a correspondingly shaped spherical end 12 of a movable tubularextension 13. An insulating sphere 15 is positioned within thesespherical members and carries a conducting link 14. This link has itsupper end connected by means of the flexible conductor 16 with the main4. The members 13 and 9 are metallic and are connected with the groundedconductor 5, as illustrated diagrammatically in Figure 1. The lower endof the link 14 carries a metallic rod 17 or flexible conductor whoselower end is attached to a sphere or weight 18. It is to be noted thatthe lower end of the member 13 is provided with inwardly turned prongs19 which partially enclose the ball 18-but are spaced therefrom undernormal conditions. In using the device --8, 1the;operator sets themember 13 at the desired angle corresponding to the tilt of the car'andthus keeps the member 13 out of-contact with the ball 18. If desired aset screw 20 may be employed for locking the parts in their adjustedposition. If the car isdisturbed under these conditions and is drivenaway obviously it will occupy a different angular osition withreferencev to a horizontal line. n fact, the act of stepping upon therunning board is suflicient to cause contact between the ball 18 and themember 13. This tilting of the car, therefore, instantly gives thealarm.

It will be seen that a vehicle burglar alarm system has been providedwhich is of simple construction, in which the parts may be very readilyconcealed and which is highly efi'ective, such system giving an alarmwhen any door, flap or hood is opened, when the car is tilted or when anattempt is made to remove the spare tire.

Although the invention has been described in considerable detail, it isto be understood that the invention may be variously embodied and is,therefore, to be lim'ited'only as claimed.

.1 claim:

A circuit closer for a vehicle alarm system comprising a tubular bodportion adapted for attachment to the vehicle body, a second tubularmember having a universalconnection with said first tubular member andbeing fi'ictionally retained in any relative adjusted 'tion with respectto said first mention -member, said second mentioned tubular memberbeing metallic, an insulator 10 by said conductor and adapted to swingwith reference thereto, and a metallic wei ht carried at the end of saidelongated meta ic member and adapted to contact with said secondmentioned tubular member when the entire device is displaced.

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukee, in the county of Milwaukee and State of Wisconsin.

' EDWARD T. BELLMAN.

